CVE-2026-42893: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') in Microsoft Microsoft Outlook for iOS
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to perform tampering over a network.
AI Analysis
Technical Summary
This vulnerability, identified as CWE-77 (Improper Neutralization of Special Elements used in a Command), affects Microsoft Outlook for iOS version 1.0.0. It involves improper handling of special elements in commands within the M365 Copilot feature, enabling an attacker without privileges to tamper with the system remotely. The CVSS 3.1 score is 7.4, indicating high severity, with network attack vector, low attack complexity, no privileges required, and user interaction needed. Microsoft has published an official fix for this vulnerability.
Potential Impact
An unauthorized attacker can exploit this vulnerability remotely to perform tampering actions within the affected Microsoft Outlook for iOS application. The impact is limited to integrity compromise without confidentiality or availability loss. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the patch provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42893 to remediate this vulnerability.
CVE-2026-42893: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') in Microsoft Microsoft Outlook for iOS
Description
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to perform tampering over a network.
CVSS v3.1
Score 7.4high
Affected software
Microsoft
Microsoft Outlook for iOS
pkg:github/microsoft/outlook-for-iosRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-77 (Improper Neutralization of Special Elements used in a Command), affects Microsoft Outlook for iOS version 1.0.0. It involves improper handling of special elements in commands within the M365 Copilot feature, enabling an attacker without privileges to tamper with the system remotely. The CVSS 3.1 score is 7.4, indicating high severity, with network attack vector, low attack complexity, no privileges required, and user interaction needed. Microsoft has published an official fix for this vulnerability.
Potential Impact
An unauthorized attacker can exploit this vulnerability remotely to perform tampering actions within the affected Microsoft Outlook for iOS application. The impact is limited to integrity compromise without confidentiality or availability loss. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the patch provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42893 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T22:35:54.966Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42893","vendor":"Microsoft"}]
Threat ID: 6a036564cbff5d861008cc99
Added to database: 05/12/2026, 17:37:40 UTC
Last enriched: 08/11/2026, 16:57:15 UTC
Last updated: 09/12/2026, 22:01:33 UTC
Views: 83
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.